<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Demo</title>
    <!-- 请勿在项目正式环境中引用该 layui.css 地址 -->
    <link href="//unpkg.com/layui@2.9.7/dist/css/layui.css" rel="stylesheet">
    <style>
        .login{
            margin-top: 200px;
        }
    </style>
</head>
<body>
<style>
    .demo-login-container{width: 320px; margin: 21px auto 0;}
    .demo-login-other .layui-icon{position: relative; display: inline-block; margin: 0 2px; top: 2px; font-size: 26px;}
</style>
<form class="layui-form login"  id="login-form" lay-filter="demo-val-filter">
    <div class="demo-login-container">
        <div class="layui-form-item">
            <h2 style="color: #16baaa;text-align: center">欢迎登录</h2>
        </div>
        <div class="layui-form-item">
            <div class="layui-input-wrap">
                <div class="layui-input-prefix">
                    <i class="layui-icon layui-icon-username"></i>
                </div>
                <input type="text" name="username" value="" lay-verify="required" placeholder="用户名" lay-reqtext="请填写用户名" autocomplete="off" class="layui-input" lay-affix="clear">
            </div>
        </div>
        <div class="layui-form-item">
            <div class="layui-input-wrap">
                <div class="layui-input-prefix">
                    <i class="layui-icon layui-icon-password"></i>
                </div>
                <input type="password" name="password" value="" lay-verify="required" placeholder="密   码" lay-reqtext="请填写密码" autocomplete="off" class="layui-input" lay-affix="eye">
            </div>
        </div>
        <div class="layui-form-item">
            <div class="layui-row">
                <div class="layui-col-xs7">
                    <div class="layui-input-wrap">
                        <div class="layui-input-prefix">
                            <i class="layui-icon layui-icon-vercode"></i>
                        </div>
                        <input type="text" name="captcha" value="" lay-verify="required" placeholder="验证码" lay-reqtext="请填写验证码" autocomplete="off" class="layui-input" lay-affix="clear">
                    </div>
                </div>
                <div class="layui-col-xs5">
                    <div style="margin-left: 10px;">
                        <img src="https://www.oschina.net/action/user/captcha" onclick="this.src='https://www.oschina.net/action/user/captcha?t='+ new Date().getTime();">
                    </div>
                </div>
            </div>
        </div>
        <div class="layui-form-item">
            <input type="checkbox" name="remember" lay-skin="primary" title="记住密码">
            <a href="#forget" style="float: right; margin-top: 7px;">忘记密码？</a>
        </div>
        <div class="layui-form-item">
            <button class="layui-btn layui-btn-fluid" lay-submit lay-filter="demo-login">登录</button>
        </div>
    </div>
</form>

<button id="btn">赋值</button>

<!-- 请勿在项目正式环境中引用该 layui.js 地址 -->
<script src="//unpkg.com/layui@2.9.7/dist/layui.js"></script>
<script>
    layui.use(function(){
        // 引入使用的模块
        var form = layui.form;
        var layer = layui.layer;
        var $ = layui.$;
        // 提交事件
        form.on('submit(demo-login)', function(data){
            var field = data.field; // 获取表单字段值
            // 显示填写结果，仅作演示用
            // js 对象  -> json字符串

            let s = JSON.stringify(field);
            //  js对象  <- json字符串  {code:200,message:"",data:{}}
            let parse = JSON.parse(s);


            // 此处可执行 Ajax 等操作  /user/login
            // …
            return false; // 阻止默认 form 跳转
        });
        $("#btn").on("click",function () {

            // 表单的赋值操作
            form.val("demo-val-filter",{
                username:"tom",
                password:"123456",
                captcha:"123456"
            })

        })
    });
</script>

</body>
</html>
